Mixing-machine



H. MISCAMPBELL.

MIXING MACHINE. I APPLICATION FILED MAR. 26, 1921'.

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MIXING MACHINE.

APPLICATION FILED. MAR-26. I921.

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2 SHEETS-SHEET 2- Patented Nov. 29, 1921.

MIXING-MACHINE.

Application filed March 26, 1921.

T0 (4Z2 whoa/t it may concern Be it lrnown that 1, HUGE MISOAMPBELL, a citizen of the United States, residing at Duluth, in the county of St. Louis and State of Minnesota, have invented certain new and useful Improvements in Mining- Machines, of which the following is a specification, reference being bad therein to the accompanying drawing.

This invention relates to improvements in mixing machines and has special reference to that class of machine disclosed in my United States Patent No. 646,5 A of April 3rd, 1905, which are used for mixing concrete or stirring and mining lime in the process of hydrating same.

The principal object of my present invention is to produce a more practical and efficient machine of this type than heretofore known and one that will more evenly and quickly produce the desired results when used in the process of hydrating lime, wherein it is known that when certain classes of lime are being operated upon the handling of same must bedone as quickly as possible.

-Uther objects construction of my presen't'invention will appear in the further description tlereof. Referring to the accompanying drawings in which lilrereference characters indicate like parts:

Figure 1 is a top plan view of one of the improved mixers; and p 1 Fig. 2 is a side elevation of same showing a portion near the. centerthereof broken away and in section.

As in the former invention above referred to the mixer is mounted upon a suitable fabricated structure or base indicated at l, a pivotal shaft 2 extending upwardly from the center thereof and surrounded bya turntable 3 in which balls or other suitable anti-friction means is installed and upon which the circular' rotatable platform of the mixer rests, it being-composed of a suitable fabricated structure, the floor of which is indicated at 4:. About the cir cumferential edge of the platform elant, depending therefrom is an annular geared raclr whichmeshes with pinion 6 on the shaft '7, the latter being driven by a suitable spur gear connection with the shaft 8 which furnishes the power for the device.

Above the floor t and about its circumferential edge extends the annular wall 9 Specification of Letters Patent.

and advantages of the novel Patented Nov. 29, 1921.

Serial no, 455,876.

and within which upon the floor is dumped or fed in any desired manner the material to be mixed.

Around the shaft 2 and concentric with the wall 9 is a like wall or cylindrical poras the mixer is being revolved, themechanism for operating said drum being described later.

N tioaced above the up aermost ed e of the l l c container and the drum thus described and attached rigidly to the shaft 2, is a fabricated metal spider, the arms 11 of which extend radiall from the supporting hub 12 outwardlysover the mixing receptacle and the outermost edges of these arms are supported, in addition to their inherent strength. by suitable guy rods 13 leading to a holding cap 14: mounted uponthe uppermost end of the shaft 2. Beneath these arms 11 are fastened as by bolts and clips indicated at 15, spirally disposed plow'supporting beams or bars 16, they being uniformly spaced about the drum 10. To these beams 16 are fastened as by clamps indicated at 17 depending plow supporting rods or stanchions 18, each of which carry upon their lowermostends a plow 19; The stanchions 18 are spaced substantially equidistance apart lo udinally the beam and on every alternate beam the plows are set to engage the material being acted upon and turn it over in the opposite direction to those on the next succeeding beam, the

This cylinder or drum bottom of the plows l0 occurring as closely as possible to the floor 4. of the rotative portion of the mixer without producing objectional frictional contact therewith, and, as is obvious, the plows are at all times held lOO stationary and maintain their respective position in relation to the floor of the re ceptacle. There are an even number of beams 16, but on those which carry the plows that turn the material being mixed inwardly I prefer to have a larger number of plows preferably one more than ,on the beams which turn the material outwardly, this being for the purpose of, compensating for the centrifugal action of the rotating mass being turned, which arrangement has proven very satisfactory in actual practice.

other receptacle not shown.

At 20 is illustrated a battle or discharge board which. is tangentially disposed in respect to the drum l0 and is supported externally of the rotative member of the mixer by a'suitable upwardly extending arched post 21, said post being of inverted general U-shape the outer portion 22 of which is cogged forming a vertically disposed leg into which the pinion 23 on the shaft 24: 1s

mounted, said shaft being actuated by the is carried about in the rotating receptacle to be directed toward the drum 10, and, when the latter i raised for such purpose, it is evidentthat by practically a slngle rotation of the mixer all of the contents thereof willbe discharged underneath the drum 10 through the annular opening 5, from whence it falls from adjacent the center of the mixer into any form of conveyer or A brace and adjusting rod is shown at 27, one end of which is connected as at 28 to the baffle 20, the outer end being connected as at 29 to the hand lever 30, this construction permitting of convenient swinging of the free end of the baflie 20 to regulate the discharge of the material before described, and which is simply for the purpose of added convenience inregnlating the discharge. The other portion of the baffle supporting post 21 is mounted upon the stationary post 31 forming a portion of the supporting structure of the mixer. I

The drum 10 is vertically adjustable by means of a support described as follows:

The wheel like spider 32, having a central hub portion 33, is slidably mounted upon the shaft 2 just above the floor 4 of the mixer and at its outer circumferential edge is securely attached to the walls of the drum 10 forming a pivotally and vertically slidable support for saidv drum. Spaced above this support 32 and similarly fastened to the inside of the drum 10 is a Z-shaped annular bar 3 1 the lower inwardly projecting edge of which rides upon the four sheave like -Wheels 35 carried upon the extreme outer ends of the shaft 36 of the non rotatable spiderstructure indicated at 37, which has i a hub portion 38 vertically slidably' mounted upon the shaft 2 and by which structure the drum 10 is permitted to readily travel with the rotative portion of the mixer while the spider 37'remains in non rotative position,

but adjustable vertically. This latter is accomplished b r the two vde aendin chains 39 i .l a a the upper ends of which are attached to a horizontally disposed shaft d0 one upon either side of the shaft 2 the former shaft being carried in a suitable fixed oflset bracket ll fixed to the shaft 2. The lower end of each chain 39 is provided with a bridle indicated at 42 one branch of each extending to one of the shafts 36 so that when the shaft 40 is rotated and the chains 39 wound up *thereupon the bridles 42 will lift equally upon all. sides of the spider 37 and raisethe rotating drum 10, the latter being permitted to continue such motion by traveling upon the sheave like wheels 35.

The outer end of the shaft 40 is mounted in a suitable journal box 43 mounted'upon the upper end of the fixed post 46 which is a part of the stationary support of the mixer. Beyond the journal 43 and upon the shaft 40 is fixed a suitable gear wheel 45 which meshes with a smaller gear 44 carried on a stub shaft d8 just below the shaft 40 and by which said latter shaft is rotated the stub shaft 48 being operated by a suitable hand wheel 47.

From the foregoing it is evident that material carried about upon the rotating portion of the mixer and engaging the plows will be turned over in alternate opposite di- 7 rections at least 6 different times during one rotation'of themachine, such rapid mlxing action being found essential to the successful handling of certain classes of material and by further rotation of the machine any of the class described comprising a rotative receptacle having a centrally disposed concentric drum therein, of a plurality of radially disposed arms extending outwardly from the axis of said drum, spirally. disposed plow supporting beams carried by said radially disposed arms, spaced plow stanchions fixed to said beams and depending therefrom, and plows fixed to the lower ends of said stanchions, those upon the stanchions supported by one beam being set to act in the opposite direction to those carried by the next adjacent beams, substantially as and for the purpose described.

2. In amixer of the class described the combinationwith a rotative receptacle supported upon a vertically disposed axis, having an annular discharge opening through the bottom of said receptacle adjacent the axis thereof, a manually adjustable drum about said discharge opening and normally preventing material within the receptacle from being discharged through the opening,

and means for intermittently raising and lowering the drum, of plow supporting arms above the drum disposed radially therefrom outwardly over the receptacle, spirally disposed plow supporting beams carried by said radially disposed arms, and a plurality of plows spaced longitudinally of and depending from said beams into the receptacle, the plows upon each being positioned so as to turn the material in the receptacle in the opposite direction to the plows on the two next adjacent beams.

3. A rotative mixer of the class described comprising in combination a rotative receptacle having a centrally disposed concentric drum therein, a plurality of radially disposed arms extending outwardly from the axis of said drum, spirally disposed plow supporting beams carried by said radially disposed arms, spaced plow stanchions fixed to said beams and depending therefrom, and plows fixed to the lower ends of said stanchions.

In testimony whereof I hereunto afiix my S. C. BRoNsoN, S. Gno. STEVENS. 

